How MP3 Work

MP3 is a piece of audio data that is compressed by technique called perceptual noise shaping. It is an algorithm compression that uses the characteristics of the human ear.

A 32 Megabyte song on a CD can be compress down to about 3 MB without affecting the quality of the song's sound. Uploading and downloading a song can be completed in minutes and it is now possible to stock up hundreds of songs in your computer's hard disk or mp3 players without taking up that much space.

The MP3 movement are consists of the MP3 format and the Internet ability to promote and share out MP3 files. It has made it easy for anyone to distribute music at nearly no cost or to find music and access it instantly. The procedure of creating MP3 is basically simple. First, download MP3 file from a web site and play it. Second, rip a song from a music CD and play it directly or encode it as an MP3 file. Third, record a song yourself, convert it to an MP3 file and make it available to the world. Fourth, convert MP3 files into CD files and create your own audio CDs from MP3 files on the web. Fifth, rip songs off of various music CDs and recombine them into your own custom CDs. Six, store hundreds of MP3 files on data CDs. Finally, load MP3 files into tiny portable players and listen to them wherever you go. To do these astonishing things, all you need is a computer with a sound card and speakers, an Internet connection, a CD-R drive to create CDs and an MP3 player.

MP3 is the file extension for MPEG, audio Layer-3 and MPEG acronym is Moving Picture Experts Group. It is the group which developed the compression systems used for video data's like DVD movies, HDTV broadcasts and DSS satellite systems, with the use of MPEG compression to fit video and movie data into smaller spaces. The MPEG compression system includes a subsystem to compress sound, called MPEG audio Layer-3. The Layer 3 is one of three coding schemes (layer 1, layer 2 and layer 3) for the compression of audio signals. It uses perceptual audio coding and psychoacoustic compression to remove all superfluous information. It also adds a MDCT (Modified Discrete Cosine Transform) that gear the filter bank, rising the frequency resolution 18 times higher than that of layer 2.